3 Steps To Removing Rust From Your Metal Roof

By Johan | August 6, 2017 | Roofing

Does your home have a rusty metal roof? Your’e not a lone. Rust is one of the biggest issues that people deal with when they have a metal roof. Metal roofing is great when it comes to durability and energy efficiency, but they do have one major drawback: they rust.

Flat roof repair Toronto for metal roofs can be a challenge, but it’s not impossible. Fortunately, there are easy ways to remove rust from your home and make sure it does not return. This article will discuss how to deal with a rusty roof.

1. Removing The Rust

The most effective way to get rust off of your roof is to use oxalic acid. Mix 1 pound of oxalic acid and 1 gallon of water to make the concentrated solution, then pour the mixture into a spray bottle. Spray the solution on the rusted areas of the roof. After that, the rust should disappear.

After removing the rust, you will need to rinse off the area with water. You need to make sure that there are no traces of rust left over. If you allow any amount of rust to remain, it could spread to the rest of the roof and you will have to repeat the process again. If you notice that there are sections where the rust remains, remove it with a wire brush.

2. Find The Source Of The Rust

After you get rid of the rust, you will want to make sure you find out where it’s coming from. It could be an antenna, pipe, or other such source.  If the rust is coming from the metal of the roof itself, you will need to get in touch with the company that manufactured it. You may need to switch out a section of the paneling to make sure the rust doesn’t spread.

3. Keeping The Rust Out

After removing the rust and finding the source, it’s time to prevent the rust from returning. Painting the roof is the most effective way of doing this.

Here are the steps:

  • First, remove any scaled rust or flaking paint by power washing the roof.
  • Use trisodium phosphate to clean the roof. If you see that there is algae or mold on the roof, use bleach to remove it.
  • Rinse off the roof with water, then allow it to dry.
  • After the roof is clean, apply steel primer. You should only need to use one coat.
  • Apply the topcoat with the color of your choice. Make sure you use the right type of paint for the environment you live in.


Rust can cause major damage to your metal roof. Flat roof repair requires your diligence. You need to make sure that you are constantly ensuring that your roof is not rusting. If you follow the steps outline in this article, it will make it much easier to remove the rust and prevent rust from spreading again. This will save you a lot of money in repairs later on.